Aptitude and Reasoning Questions

Q:

If the roots of the equation a(b  c)x2 + b(c  a)x + c(a  b) = 0 are equal, then which of the following is true?

A) b = ( a + c)/ ac B) 2/ b = (1/ a) + (1/ c)
C) 2 b = (1/ a) + (1/ c) D) abc = ab + bc + ca
 
Answer & Explanation Answer: B) 2/ b = (1/ a) + (1/ c)

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Filed Under: Simplification
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Q:

What is the reflection of the point (5, 3) in the line y = -2?

A) (-9 , 3) B) (-5 , -7)
C) (-9 , -3) D) (5 , -7)
 
Answer & Explanation Answer: D) (5 , -7)

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Filed Under: Area
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Q:

A triangular prism has 9 edges. How many vertices does it have?

A) 8 B) 6
C) 12 D) 10
 
Answer & Explanation Answer: B) 6

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Q:

Three solid spheres have their radii r1, r2 and r3. The spheres are melted to form a solid sphere of bigger radius. Then the radius of the new sphere is

A) r1+r2+r3 B) r12+r22+r3212
C) r13+r23+r3313 D) r14+r24+r3414
 
Answer & Explanation Answer: C) r13+r23+r3313

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Filed Under: Volume and Surface Area
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Q:

Find the wrong number in the series 28, 33, 31, 36, 34, 29

A) 33 B) 36
C) 34 D) 29
 
Answer & Explanation Answer: D) 29

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Filed Under: Arithmetical Reasoning
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Q:

In the following question, four number pairs are given. The number on left side of (–) is related to the number on the right side of (–) with some Logic/Rule/Relation. Three are similar on basis of same Logic/Rule/Relation. Select the odd one out from the given alternatives.

A) 2 – 4 B) 4 – 16
C) 6 – 36 D) 8 – 66
 
Answer & Explanation Answer: D) 8 – 66

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Filed Under: Odd Man Out
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Q:

Find the area (in sq.cm) of a semi-circle of radius 7 cm

A) 154 B) 21
C) 42 D) 77
 
Answer & Explanation Answer: D) 77

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Q:

If x2  4x + 1 = 0, then what is the value of x9 + x7  194x5  194x3?

A) 4 B) – 4
C) 1 D) – 1
 
Answer & Explanation Answer: B) – 4

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Filed Under: Simplification
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